The connection? McKee is responsible for Taio Cruz's chart-topping song "Dynamite," which stormed the radio beginning in 2010. In the song, Cruz sings: "I throw my hands up in the air sometimes saying ayeoh, gotta let go."
Billboard asked McKee if she took that line in Lorde's song personally. "Yeah, absolutely I did," she said, adding that was the first time someone had asked her that question. "I remember when that came out I was like, 'All right, all right bitch, I hear you.' Which is funny, because when 'Dynamite' came out -- I mean, look, I didn't start the saying “throw your hands up in the air.” But it was a massive hit, and then all the sudden you start hearing every song talk about putting hands up in the air. I was also like, 'But Lorde, you don't understand where I was coming from! [Laughs.] You don't understand that that's a really deep song to me.'”
She adds: "I was insulted by that, definitely. Clever, though. Even though she stole my Grammy [for song of the year in 2014, when McKee was nominated for Perry's "Roar"], I still love her."

There's also a few other interesting quotes in the same interview, including her favorite choruses of the 21st century (Kelly Clarkson’s “Since U Been Gone,” Lady Gaga's “Poker Face” and Carly Rae Jepsen's “Call Me Maybe”) and more on collaborating with Katy Perry. Read it here.